Home / 852,101.10-1,278,151.65-431,322.30

Finding the Fourth Proportional to 852,101.10, 1,278,151.65 and 431,322.30

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Solution

The fourth proportional to 852,101.10, 1,278,151.65 and 431,322.30 is: 646,983.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    852,101.10 : 1,278,151.65 = 431,322.30 : x
  2. Step 2: Convert to fraction form
    852,101.10/1,278,151.65 = 431,322.30/x
  3. Step 3: Cross multiply
    852,101.10x = 1,278,151.65 × 431,322.30
  4. Step 4: Simplify right side
    852,101.10x = 551,295,309,426.80
  5. Step 5: Solve for x
    x = 551,295,309,426.80/852,101.10
  6. Step 6: Final answer
    x = 646,983.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.